Furnace heat deflector



Nov. 26, 1940. H.'J. JACKSON 2,223,108

FURNACE HEAT DEFLEC'IOR Filed Dec. 5, 1938 2 Sheets-Sheet 1.

. 4/ I g i Nov. 26, 1940.

H. J. JACKSON 2 Sheets-Sheet 2 Filed Dec. 5, 1938 Patented Nov. 26, 1940 UNITED STATES PATENT OFFICE 7 Claims.

This invention relates to an improvement in heat deflectors,-primarily for use in furnaces of the type using oil as the combustible material, although it will be apparent that it will be usable in like manner in other types of furnaces, such as gas furnaces, etc.

One object of this invention is to deflect the heat of the burner to the nearest point at which the cold water enters the boiler of the furnace.

' Another object is to support the deflector in a suspended position on the domestic hot water coil that extends into the furnace, so as to avoid and make unnecessary direct connections between the deflector and the furnace walls or supports from below, so as not to obstruct the circulation of heated air about the burner.

Another object of the invention is to facilitate attachment of the deflector to the heating coil for support thereby by constructing said baflle in sections with openings in facing edges thereof to receive a portion of the heating coil and provision for securing the'sections thereon.

Another object of the invention is to provide for ready installation of the deflector through the furnace door by constructing it in sections which may be individually inserted therethrough and then fitted together around the heating coil.

Still another object of the invention is to provide an increased amount of heat for the hot water coil with a minimum of heat by the burner, by the suspending of an additional or extended coil directly over the heater and supported by the hot water coil just beneath the deflector.

In carrying out these objects, I utilize the usual hot water coil extending into the furnace just above the heating unit thereof, on which coil is suspended and. held a deflector which is constructed substantially in the shape of av plate or baiiie but divided into sections for individual insertion through the furnace 'door'and assembly within the heating chamber of the furnace. These sections are provided with suitable grooves or openings therein to receive and fit about the heating coil and provision is made for securin the sections in place thereon. l

A preferred embodiment of the invention,v together with a modification thereof, is illustrated in the accompanying drawings in which:

Fig. 1 is a partial vertical sectional view through a furnace showing the invention applied thereto, parts being in elevation;

Fig. 2 is a similar view showing a modification; Fig. 3 is a top plan view of the deflectom' Fig. 4 is an inside edge View of one of the sections thereof; 1 i Fig. 5 is a transverse sectional view through the deflector on'the line 55 of Fig. 3;

Fig. 6 is a similar view on the line 6-6 of 0 Fig. 3;

Fig. -7 is a-similar view on the line 7-1 of Fig. 3; and l Fig. 8 is a disassembled perspective view of the sections of-the deflector.

The invention is shown applied to a domesti 5 hot water heating furnace designated generally bythe numeral I, which has the usual heating chamber 2 therein surrounded by a hot water heating jacket 3, having-an inlet pipe 4 and outlet pipes 5, extending to the several heating I0 radiators in the usual way. One side of the furnace has a door 6 for gaining access to the interior of the heating chamber 2. A conventional oil or gas burner I is shown at the bottom of the heating chamber 2, for supplying the proper and desired heat for the furnace.

A domestic hot water tank is shown at 8, having inlet and outlet pipes 9 and Ill, respectively,

extending from the bottom and top thereof through a Wall of the furnace I to the interior of the heating chamber 2, where they are joined together by a T H with which said pipes have screw-threaded connections, and forming a heating coil for circulating the hot water from within the tank 8 into the heating chamber of the furtrace and back into the tank, to maintain the proper condition of heat desired in the domestic hot water tank.

Mounted on the heating coil is a heat deflector or baffle designated generally by the numeral I2 constructed in two sections divided diametrically. The under surface of the deflector I2 is concave as shown at I3, tapering from all directions toward the center thereof, while a recess I4 is formed at the center to receive the T H, the recess l4 being enlarged at [5 from the concave surface I3 upward to a point appreciably above the center line of the baflle l2 to accommodate the middle connection of the T and to permit the latte'rto slide into the center of the baffle in 40 position for connection with the pipe 9 or for fitting about said T and pipe. The adjacent edges of the sections of the deflector I2 at one sideof the center thereof are formed with complementary grooves l6 therein (Fig. 8) to accommodate the pipe 9 and to fit about said pipe when assembled thereon, while the adjacent edges of the sections on the opposite side of the center thereof have complementary groove H and rib l8 interfitting with each other, as shown in Fig. 6, so as to form a tight joint therebetween.

With the sections of the domestic heating coil 9, l0, coupled together by the T ll, within the heating chamber 2 of the furnace, it will be a simple matter to install the heat deflector or baffie thereon. This being in sections, these may be introduced through the door 6, individually and then fitted together around the T and. pipes, substantially in the position shown in Figs. 1 and 2, where the sections are secured together in any suitable manner, as by wires l9 extending in peripheral grooves 20, the ends of which wires are brought together and secured as by twisting at 2| to secure the sections of the deflector l2 together and in place on the coil. This locates the deflector immediately above the burner I, while the concave under surface l3 thereof will direct a major portion of the heat from the burner to'-.

ward the heating coil T H and the portions of the coil joined therewith, while heat will also be directed laterally against the sidewalls of-the heating chamber 2, adjacent the point' at which water enters the water jacket 3, so as to obtain a maximum efliciency of the heat in heating the water circulated both from the radiator heating system and from the domestic water tank. By

supporting the deflector or baffie in a jsuspended coil 9'; Ill sufficiently, some heat being applied thereto externally of the deflector.

Normally the lower end of the 'T H is closed by a plug 22' during the use of the-furnace, in supplying heated water totheradiators', but during the summer or period when it may be desired only-to ,heat the water in the tank 8,- greater efliciency will be obtained: by the connection of a coil 23 with the lower end of the T H, as shown in Fig. 2, which extends downward therefrom directly over the burner 1, so as to heat thewater therein, while maintaining an appreciably lower flame at the burner and without imparting as much heat to the under surface of the deflector [2. .The extension 23 is in open communication with the interior of the T H and of the pipes 9 and I0, and will be filled with water when in use, through which the heat will be conducted to the water passing through the coil 9,. {0, so as to heat the water in thetank 8-, even though a reduced flame is maintained at the burner. This auxiliary extension 23' may be used during the summer, but it is' preferred that it be replaced by the plug 22 during the winter when the flame will'be increased to heat the water the radiator system. V

The deflector preferably is constructed of an efficient fire clay, preferably a material sold under the trade name Mul-lite, which is originally found in India, and which is highly heat resistant.

I claim:

11'. The combination with a furnace having a heating chamber therein and a burner in the lower portion of said'chamber, of a hot water heating coil carried by the furnace and extending from a wall of the heating chamber inwardly approximately to the. center thereof, said heating coil having approximately vertical and horizontal portions-adjacent the center of the heating chamher, a sectional heat deflector having openings in the coacting faces of; the, sections to receive and embrace the vertical and: horizontal portions of the coil-and suspend the deflector from over the burner, and means for securing the sections in place on the coil.

. '2. The combination with a furnace having a heating chamber therein and a burner at the lower: portion of said heating chamber, of a. hot

water heating coil carried by the furnace and extending into the heating chamber approximately to the center thereof, said coil having an angular coupling at the inner end portion thereof, a sectional heat deflector having axial andradial openings in opposing sides of the sections thereof receiving the coupling and coil respectively with an enlargement at one side of the axial opening for an angular portion of the coupllng, and means for securing the sections together around the coil for suspending the deflector therefrom. r

3; The combination with a furnacehaving a heating. chamber therein and a burner at the lower portion of said heating chamber, of a hot water heating coil carried by-the'furnace and extending, into the heating chamber approxi-' mately to the center thereof, said coil having a T at the inner end thereof, a sectional deflector having axial and radialopenings in opposing faces of the sections thereof receivingthe T and portion of the coil therein respectively with an en- T at the inner end thereof, a'sectional' deflector having axial and radial openingsv in opposing faces of thesectionsth'ereof receiving the. I and portion of the coil" therein respectively with an enlargement at one side of the" axial opening receiving an angular p'ortioniof the. T, and means for securing" the. sectionstogether' about the T and coil, the sections at the: sideopposite the radial opening having interfltting means therebetween to provide a tight joint, the T' extending to the under surface of the deflector, said under surface being concave and taperingupwardly to saidT. V

5; A heat deflector comprising a disc-likebod-y divided into a plurality of sections, said sections havingcomplementary openings therebetween axially and radially of thedisc; said axial and radial openings being in communication to receive a" heating coil therein; I

6. A heat deflector comp-rising a disc-like body surface tapering. upwardly to.- said central open- '7. The combination with a furnace having a heating chamber: therein and a burner in the lower portion of. said?chamber,v of a hot water heating coil carriedby'thewfurnace and extending into said heating chamber," a disk-like heat defleet-or having portionsof the heating coil extending axially and-radially through portions of the deflector for supporting said deflector on the coil.

, enna; J JACKSON. 

